Radiometrix Ltd

LMT2/LMR2 Data Sheet

page 8

Condensed specifications

Frequency

433MHz EU band, and 458MHz UK band

As supplied: EU version: 433.875 - 434.65MHz (25kHz steps)

UK version 458.525 - 459.1MHz (25kHz steps)

Other custom UHF bands

Frequency stability

±1.5kHz

Channel spacing

25kHz

Number of channels

16 channels controlled by parallel port

or 32 via RS232 interface

Operating temperature

-10 ºC to +60 ºC (Storage -30 ºC to +70 ºC)

Spurious radiations

Compliant with ETSI EN 300 220-3 and EN 301 489-3

Transmitter

Output power

+10dBm (10mW) ±1dB (factory adjustable 1 - 25mW)

+20dBm (100mW) ±1dB (factory adjustable 25 - 100mW)

Peak deviation

±3kHz

TX on switching time

30ms from TXE transition

Modulation type

FSK (F3D)

TX modulation bandwidth

DC – 5kHz (3V CMOS compatible)

Adjacent channel TX power

<-37dBm

TX spurious

<-45dBm (no RF output in Standby)

Supply

Voltage

3.1V – 15V (1-25mW)

4.1 – 15V (25 – 100mW)

Current

34mA @ 10mW (nominal)

65mA @ 50mW (nominal)

90mA @ 100mW (nominal)

<5

µA standby (TXE high or floating)

Inputs

data (CMOS/TTL compatible)

Size

33 x 23 x 9mm

Interface

User

10 (8) pin 0.1" pitch dual row (5+5) header

RF

2pin 0.1” pitch

Recommended PCB hole size

1.2mm

Receiver

Sensitivity

-118dBm for 12dB SINAD

S/N ratio

35dB (min), 40dB (typ) on AF output

AF bandwidth (-3dB)

4kHz

image

<-60db

Othr spurious

<-70dbm

Blocking

Better than 84dB

Adjacent channel

<-60dB

LO re-radiation

-70dBm

Supply

Voltage

3.1V – 15V

Current

20mA receive

<1

µA standby (RXE low)

Outputs

RSSI, audio, data (quasi DC data recovery circuit)

Size

46 x 23 x 9 mm

Interface

User

10 pin 0.1" pitch dual row (5+5) header

RF

2pin 0.1” pitch

Recommended PCB hole size

1.2mm